Dust-collector



(No Model.) W- H. DUST UOLLEGTOR.

No. 420,296. Patented Jan. 28, 1890.

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WILLIAM H. CURTIS, OF EAST SAGINAW, MICHIGAN.

DUST-COLLECTOR.

SPEOIFIC'ATION forming part of Letters Patent No. 420,296, dated January 28, 1890.

Application an January 27, 1888- 1 Serial No. 262,189. on model.)

To all whom it may concern:

Be it known that 1, WILLIAM H. CURTIS, a citizen of the United States, residing at East Saginaw, in the county of Saginaw and State 5 of Michigan, have invented certain new and useful Improvements in Dust-Collectors; and

I do hereby declare the following to be a full,

clear, and exact description of the invention,

such as will enable others skilled in the art to to which it appertains to make and use the same. I

mills, factories, 850., for freeingthe air from r 5 the dust, shavings, or other solidparticles con= tained therein, and in which the dust-laden air receives a rapidrotativeor whirling motion in the separatingchamber, whereby the dust or solid particles are driven out of the air-current and against the inner surface of the chamber by centrifugal force; and it con sists in the construction and arrangement or combination of parts hereinafter disclosed in the description, drawings, and claims.

The object of my invention is'to'produce a machine which will effect a perfect separation of the air and fine dust from the coarser dust, shavings, or other material, and also the fine dust from the air, and effectually diso pose of the same, and whichwill be simple in construction, compact, and easilynnderstood and operated. I I 3 In my invention the dust laden air is delivered tangentially into the separating-cham- 5 ber, and the dust particles are thrown against and precipitated by the inner surface of an imperforate casing, which forms the inclosore of said separating-chamber, and are forced downward to dust-discharge openings in the 40 bottom of said separating-chamber by means of inclined shelves. The dust particles are discharged into a hopper arranged on the under side of the separating-chamber and the air in the hopper passes back into said separating-chamber. In the top of said separating-chamber is formed a circular dischargeopening for the escape of the air, which is usually laden with more or less fine dust.

Above this opening, communicating therewith and attached to the upper end of the Memes O-Jflmmher proper, is a supplemental This invention relates to improvements in the class of machines which are employedin inclosure or chamber,

3, a horizontal The separatingbhamber is constructed of which receives the rotating air and fine dust as they are delivered from the lower or main separating-chamber, and continues the whirling or rotating motion 5 5 thereof for the purpose of further separating and saving said fine dust and permitting the air to escape in a purified condition.

In the accompanying drawings, forming part of this specification, wherein the same 60 reference-lettersindicate the same parts, Figure 1 represents a my improved dust-collector, the section of I the separating-chamber being taken on the irregular line 10 w of zontal section on the line m a: of Fig. I; Fig.

section on the line y y, and 4 a horizontal section on line a z of same figure. I I

a bottom A, a top A, and a casing A", providedwith an external tangential inlet-spout a. The top is formed with acircular dischargeopening A5, leadingupward from the central portion of the e this opening is secured a short pipe Af, whichextends downward into the central portion of said chamber, and forms a dustretaining or retarding space a between the same andthe inner surface of the upper por 8o tionof thecasing.

InthebottoinAof the separating-chamber are formedopenings B B,for the discharge of a the heavier dust into the hopper C, said openings being elongated in form, so that the 8 5 exit therethrough of the heavier particles will not all occur at one point, and thuscholi ing or filling up of said openings will be enj tirely avoided. 1 To the inner surface of the casing of the separating-chamber are secured downwardlyinclined shelves or deflectors D D, which extend from points between the top and bottom of the separating-chamber to points a short distance above and beyond the elongated openings B B, as shown The bottom A is also formed with a central opening a' in communication with the central portion of the chamber and the hopper. This opening is covered with a cone E,which at its base is supplied with openings 6 c, for forming communication between the hopper and the cencentral vertical section of I 1 Fig. 2; Fig. 2, a hori- 65 chamber, and within 75 l (No Model.) I

G. W. GARDNER. IRONING BOARD.

N0. 420,297. Patented Jan. 28, 1890.

Fig.1.

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